- In ethnolinguistics, an endonym or autonym is a local name for a geographical feature, and an exonym or xenonym is a foreign language name for it.
Exonyms and endonyms can be names of places (toponym), ethnic groups (ethnonym), languages (glossonym), or individuals (personal name).

For example, China, India, Germany, Greece, Japan, and Korea are the English exonyms corresponding to the endonyms Zhongguo, Bharat, Deutschland, Hellas, Nippon/Nihon, and Hanguk/Chosŏn, respectively.